XR16L570
37
REV. 1.0.1
SMALLEST 1.62V TO 5.5V UART WITH 16-BYTE FIFO AND POWERSAVE
NOTE: * For faster data rates, see the data rate characterization data on page 38. AC ELECTRICAL CHARACTERISTICS
UNLESS OTHERWISE NOTED: TA= -40
O TO +85OC, VCC=1.62 - 2.75V, 70 PF LOAD WHERE APPLICABLE
SYMBOL
PARAMETER
LIMITS
1.8
MIN
MAX
LIMITS
2.5
MIN
MAX
UNIT
-
Crystal Oscillator Frequency
12
18
MHz
OSC
External Clock Frequency*
12
24
MHz
CLK
External Clock Low/High Time*
40
20
ns
TAS
Address Setup Time
5
ns
TAH
Address Hold Time
0
ns
TCS
Chip Select Width
250
100
ns
TRD
IOR# Strobe Width
250
100
ns
TDY
Read Cycle Delay
250
100
ns
TRDV
Data Access Time
175
75
ns
TDD
Data Disable Time
0
30
0
30
ns
TWR
IOW# Strobe Width
250
100
ns
TDY
Write Cycle Delay
250
100
ns
TDS
Data Setup Time
75
25
ns
TDH
Data Hold Time
3
ns
TWDO
Delay From IOW# To Output
200
150
ns
TMOD
Delay To Set Interrupt From MODEM Input
200
150
ns
TRSI
Delay To Reset Interrupt From IOR#
200
150
ns
TSSI
Delay From Stop To Set Interrupt
1
Bclk
TRRI
Delay From IOR# To Reset Interrupt
200
150
ns
TSI
Delay From Stop To Interrupt
200
150
ns
TINT
Delay From Initial INT Reset To Transmit Start
8
24
8
24
Bclk
TWRI
Delay From IOW# To Reset Interrupt
200
150
ns
TRST
Reset Pulse Width
40
ns
N
Baud Rate Divisor
1
216-1
1
216-1
-
Bclk
Baud Clock
16X of data rate
Hz